NCATT EXAM REVIEW QUESTIONS
WITH 100% CORRECT ANSWERS
[8018] How many amps will a 28v generator be required to supply to a circuit containing
5 lamps in parallel, 3 of which have a resistance of 6 ohms each and 2 of which have a
resistance of 5 ohms each? - Answer-25.23 amps (approximately)
[8021] A 24v source is required to furnish 48w to a parallel circuit consisting of 4
resistors of equal value. What is the voltage drop across each resistor? - Answer-24v
[8026] (See fig. 7 in packet) If resistor R3 is disconnected at point D (break not drawn),
what will the ohmmeter read? - Answer-Infinite resistance
[8027] (See fig. 8 in packet) With an ohmmeter connected into the circuit as shown,
what will the ohmmeter read? - Answer-10 ohms
[8043] A circuit has an applied voltage of 30v and a load consisting of a 10ohm resistor
in series with a 20 ohm resistor. What is the voltage drop across the 10 ohm resistor? -
Answer-10v
[8048] What happens to the current in a voltage step-up transformer with a ratio of 1 to
4? - Answer-The current is stepped down by a ratio of 1 to 4
[8058] (See fig. 15 in packet) The #7 wire is used to.... - Answer-Close the PUSH-TO-
TEST circuit
[8059] (See fig. 15 in packet) When the landing gear is down, the green light will not
come on if an open occurs in which wire? - Answer-#6
[8074] (See fig. 21 in packet) Which symbol represents a variable resistor? - Answer-2
[8145] (See fig. 39 in packet) Determine the cable size of a 40ft length of single cable in
free air, with a continuous rating, running from a bus to the equipment in a 28v system
with a 15 amp load and a 1v drop. - Answer-#10 wire
[8362] Which of the following are acceptable to use in cleaning anodized surfaces? -
Answer-Aluminum wool, fiber bristle brush
[8837] How can it be determined if a transformer winding has some it its turn shorted
together? - Answer-The transformer will get hot in normal operations
,What is the resistance and tolerance of the resistor (Grn/Orn/Orn/Brn)? - Answer-53k
ohms, +/- 1%
(See Question 171 in packet) What will the ohmmeter read in the circuit? - Answer-Total
resistance (705.9 ohm)
(See Question 172 in packet) In the circuit there is a problem with one of the resistors.
What is the problem? - Answer-R3 is open
(See Question 173 in packet) In the circuit, does CR1 and CR2 conduct at the same
time? - Answer-No
What do radar waves do to your body?
Cool your blood
Destroy bone marrow
Burn your body under the flesh - Answer-Burn your body under the flesh
What type of material would burn your skin? - Answer-Caustic
If you change an aircraft radio, radio equipment, or GPS what must you do?
Make a maintenance log entry
Add to the aircraft equipment list
Add to the aircraft weight and balance record
All of the above - Answer-All of the above
If you have an STC on an aircraft to change equipment do you need any further
approval? - Answer-No
In a bipolar (any) transistor, current moves from _________ to _________ and
________ the arrow?
Negative, positive, with
Negative, positive, against
Positive, negative, with
Positive, negative, against - Answer-Negative, positive, against
, [App. A, Fig. 15] What does R4 of the Electronic Voltage Regulator (EVR) control? -
Answer-Output voltage
(See packet image) On the oscilloscope, if the time-base divisions are 50 usecs, what is
the frequency?
2 kHz
5 kHz
10 kHz
50 kHz - Answer-5 Khz
[Intro. to Elect. P. 111) True or False: Faraday's Law can be used to determine the
current carrying capacity of a conductor. - Answer-False
What percent is emitter current? Collector? Base? - Answer-100%, 95%, 5%
(See Question 183 in packet) What type of transistor is T1? - Answer-N-channel JFET
(See Question 184 in packet) What type of transistor is T2? - Answer-P-channel JFET
(See Question 185 in packet) What type of transistor is T3? - Answer-N-channel
Depletion-mode MOSFET
(See Question 186 in packet) What type of transistor is T4? - Answer-P-channel
Depletion-mode MOSFET
(See Question 187 in packet) What type of transistor is T5? - Answer-N-channel
Enhancement-mode MOSFET
(See Question 188 in packet) What type of transistor is T6?N - Answer-P-channel
Enhancement-mode MOSFET
Describe a Half Adder? - Answer-2 input Adder without a carry input
Describe a Full Adder? - Answer-2 input Adder with a carry input
Describe a Half Subtractor? - Answer-There is no borrow applied
Describe a Full Subtractor? - Answer-There is a borrow applied to the input
What are the signs of traumatic shock? - Answer-Pale wet skin and gasping for air
WITH 100% CORRECT ANSWERS
[8018] How many amps will a 28v generator be required to supply to a circuit containing
5 lamps in parallel, 3 of which have a resistance of 6 ohms each and 2 of which have a
resistance of 5 ohms each? - Answer-25.23 amps (approximately)
[8021] A 24v source is required to furnish 48w to a parallel circuit consisting of 4
resistors of equal value. What is the voltage drop across each resistor? - Answer-24v
[8026] (See fig. 7 in packet) If resistor R3 is disconnected at point D (break not drawn),
what will the ohmmeter read? - Answer-Infinite resistance
[8027] (See fig. 8 in packet) With an ohmmeter connected into the circuit as shown,
what will the ohmmeter read? - Answer-10 ohms
[8043] A circuit has an applied voltage of 30v and a load consisting of a 10ohm resistor
in series with a 20 ohm resistor. What is the voltage drop across the 10 ohm resistor? -
Answer-10v
[8048] What happens to the current in a voltage step-up transformer with a ratio of 1 to
4? - Answer-The current is stepped down by a ratio of 1 to 4
[8058] (See fig. 15 in packet) The #7 wire is used to.... - Answer-Close the PUSH-TO-
TEST circuit
[8059] (See fig. 15 in packet) When the landing gear is down, the green light will not
come on if an open occurs in which wire? - Answer-#6
[8074] (See fig. 21 in packet) Which symbol represents a variable resistor? - Answer-2
[8145] (See fig. 39 in packet) Determine the cable size of a 40ft length of single cable in
free air, with a continuous rating, running from a bus to the equipment in a 28v system
with a 15 amp load and a 1v drop. - Answer-#10 wire
[8362] Which of the following are acceptable to use in cleaning anodized surfaces? -
Answer-Aluminum wool, fiber bristle brush
[8837] How can it be determined if a transformer winding has some it its turn shorted
together? - Answer-The transformer will get hot in normal operations
,What is the resistance and tolerance of the resistor (Grn/Orn/Orn/Brn)? - Answer-53k
ohms, +/- 1%
(See Question 171 in packet) What will the ohmmeter read in the circuit? - Answer-Total
resistance (705.9 ohm)
(See Question 172 in packet) In the circuit there is a problem with one of the resistors.
What is the problem? - Answer-R3 is open
(See Question 173 in packet) In the circuit, does CR1 and CR2 conduct at the same
time? - Answer-No
What do radar waves do to your body?
Cool your blood
Destroy bone marrow
Burn your body under the flesh - Answer-Burn your body under the flesh
What type of material would burn your skin? - Answer-Caustic
If you change an aircraft radio, radio equipment, or GPS what must you do?
Make a maintenance log entry
Add to the aircraft equipment list
Add to the aircraft weight and balance record
All of the above - Answer-All of the above
If you have an STC on an aircraft to change equipment do you need any further
approval? - Answer-No
In a bipolar (any) transistor, current moves from _________ to _________ and
________ the arrow?
Negative, positive, with
Negative, positive, against
Positive, negative, with
Positive, negative, against - Answer-Negative, positive, against
, [App. A, Fig. 15] What does R4 of the Electronic Voltage Regulator (EVR) control? -
Answer-Output voltage
(See packet image) On the oscilloscope, if the time-base divisions are 50 usecs, what is
the frequency?
2 kHz
5 kHz
10 kHz
50 kHz - Answer-5 Khz
[Intro. to Elect. P. 111) True or False: Faraday's Law can be used to determine the
current carrying capacity of a conductor. - Answer-False
What percent is emitter current? Collector? Base? - Answer-100%, 95%, 5%
(See Question 183 in packet) What type of transistor is T1? - Answer-N-channel JFET
(See Question 184 in packet) What type of transistor is T2? - Answer-P-channel JFET
(See Question 185 in packet) What type of transistor is T3? - Answer-N-channel
Depletion-mode MOSFET
(See Question 186 in packet) What type of transistor is T4? - Answer-P-channel
Depletion-mode MOSFET
(See Question 187 in packet) What type of transistor is T5? - Answer-N-channel
Enhancement-mode MOSFET
(See Question 188 in packet) What type of transistor is T6?N - Answer-P-channel
Enhancement-mode MOSFET
Describe a Half Adder? - Answer-2 input Adder without a carry input
Describe a Full Adder? - Answer-2 input Adder with a carry input
Describe a Half Subtractor? - Answer-There is no borrow applied
Describe a Full Subtractor? - Answer-There is a borrow applied to the input
What are the signs of traumatic shock? - Answer-Pale wet skin and gasping for air
